scholarly journals Molecular orientation behavior of isotactic polypropylene under uniaxial stretching by rheo-Raman spectroscopy

2016 ◽  
Vol 10 (8) ◽  
pp. 701-709 ◽  
Author(s):  
T. Kida ◽  
Y. Hiejima ◽  
K.-H. Nitta
Keyword(s):  
Raman Spectroscopy ◽  
Isotactic Polypropylene ◽  
Molecular Orientation ◽  
Orientation Behavior ◽  
Uniaxial Stretching

Molecular orientation behavior of mesomorphic isotactic polypropylene under uniaxial and biaxial deformation

2010 ◽  
Vol 51 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Shingo Yoshida ◽  
Kazuomi Ishii ◽  
Takanobu Kawamura ◽  
Koh-Hei Nitta
Keyword(s):  
Isotactic Polypropylene ◽  
Molecular Orientation ◽  
Orientation Behavior ◽  
Biaxial Deformation

scholarly journals Orientation analysis of pentacene molecules in organic field-effect transistor devices using polarization-dependent Raman spectroscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Bishwajeet Singh Bhardwaj ◽  
Takeshi Sugiyama ◽  
Naoko Namba ◽  
Takayuki Umakoshi ◽  
Takafumi Uemura ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Charge Carrier ◽  
Molecular Orientation ◽  
Field Effect ◽  
High Performance ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Orientation Distribution ◽  
High Resolution Technique

Abstract Pentacene, an organic molecule, is a promising material for high-performance field effect transistors due to its high charge carrier mobility in comparison to usual semiconductors. However, the charge carrier mobility is strongly dependent on the molecular orientation of pentacene in the active layer of the device, which is hard to investigate using standard techniques in a real device. Raman scattering, on the other hand, is a high-resolution technique that is sensitive to the molecular orientation. In this work, we investigated the orientation distribution of pentacene molecules in actual transistor devices by polarization-dependent Raman spectroscopy and correlated these results with the performance of the device. This study can be utilized to understand the distribution of molecular orientation of pentacene in various electronic devices and thus would help in further improving their performances.

Study of the distribution of the molecular orientation in thick polyethylene samples by X-ray diffraction, infra-red dichroism and Raman spectroscopy

Polymer ◽  
1993 ◽  
Vol 34 (24) ◽  
pp. 5029-5037 ◽  
Author(s):  
Claude-Paul Lafrance ◽  
Paul Chabot ◽  
Marie Pigeon ◽  
Robert E Prud'homme ◽  
Michel Pézolet
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Orientation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infra Red

Shear-Induced Molecular Orientation and Crystallization in Isotactic Polypropylene: Effects of the Deformation Rate and Strain

2005 ◽  
Vol 38 (4) ◽  
pp. 1244-1255 ◽  
Author(s):  
Rajesh H. Somani ◽  
Ling Yang ◽  
Benjamin S. Hsiao ◽  
Thomas Sun ◽  
Natalia V. Pogodina ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Deformation Rate ◽  
Molecular Orientation
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